:root {
  --bg: #faf9f5;
  --panel: #ffffff;
  --sidebar: #f3f1ea;
  --text: #1f1e1d;
  --muted: #6b6a66;
  --border: #e4e1d8;
  --accent: #c96442;
  --accent-text: #ffffff;
  --accent-soft: #f5e6df;
  --danger: #b42318;
  --danger-soft: #fdecea;
  --ok: #1a7f4b;
  --user-bubble: #efece3;
  --code-bg: #f1efe8;
  --tool-bg: #f6f4ee;
  --shadow: 0 10px 30px rgba(0, 0, 0, .12);
  --radius: 12px;
  --font: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1f1e1d; --panel: #262624; --sidebar: #1a1918; --text: #ecebe6; --muted: #a3a29c;
    --border: #3a3936; --accent: #d97757; --accent-text: #fff; --accent-soft: #3b2a22;
    --danger: #f87168; --danger-soft: #3a201e; --ok: #4ade80; --user-bubble: #34332f;
    --code-bg: #181817; --tool-bg: #2b2a27; --shadow: 0 10px 30px rgba(0, 0, 0, .5);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #1f1e1d; --panel: #262624; --sidebar: #1a1918; --text: #ecebe6; --muted: #a3a29c;
  --border: #3a3936; --accent: #d97757; --accent-text: #fff; --accent-soft: #3b2a22;
  --danger: #f87168; --danger-soft: #3a201e; --ok: #4ade80; --user-bubble: #34332f;
  --code-bg: #181817; --tool-bg: #2b2a27; --shadow: 0 10px 30px rgba(0, 0, 0, .5);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--text); font: 15px/1.55 var(--font); -webkit-text-size-adjust: 100%; overflow: hidden; }
[hidden] { display: none !important; }
code, pre { font-family: var(--mono); font-size: .9em; }
h1, h2 { margin: 0 0 .4em; line-height: 1.25; }
h2 { font-size: 1.15rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.error { color: var(--danger); min-height: 1.2em; margin: 12px 0 0; }

/* buttons */
.btn { appearance: none; border: 1px solid var(--border); background: var(--panel); color: var(--text); border-radius: 10px; padding: 9px 14px; font: inherit; font-weight: 550; cursor: pointer; }
.btn:hover { filter: brightness(.97); }
.btn:disabled { opacity: .55; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.danger { background: var(--danger-soft); border-color: transparent; color: var(--danger); }
.btn.big { width: 100%; padding: 13px 16px; font-size: 1rem; margin-top: 10px; }
.btn.small { padding: 6px 10px; font-size: .85rem; }
.btn.full { width: 100%; }
.link { appearance: none; background: none; border: 0; color: var(--accent); font: inherit; cursor: pointer; padding: 10px 0 0; text-decoration: underline; text-underline-offset: 3px; }
.icon-btn { appearance: none; background: none; border: 0; color: var(--text); font-size: 1.1rem; width: 38px; height: 38px; border-radius: 10px; cursor: pointer; display: inline-grid; place-items: center; flex: none; }
.icon-btn:hover { background: var(--border); }
.row-end { display: flex; gap: 8px; justify-content: flex-end; margin-top: 16px; }

/* ---------- auth ---------- */
.auth { min-height: 100%; display: grid; place-items: center; padding: 24px 16px; overflow: auto; height: 100%; }
.auth-card { width: 100%; max-width: 400px; background: var(--panel); border: 1px solid var(--border); border-radius: 18px; padding: 28px 24px; box-shadow: var(--shadow); text-align: center; }
.auth-logo { display: block; margin: 0 auto 10px; border-radius: 10px; }
.auth-card h1 { font-size: 1.6rem; margin-bottom: 2px; }
.auth-card section { margin-top: 18px; }
.hint { font-size: .85rem; color: var(--muted); margin: 14px 0 4px; text-align: left; }
.field { display: block; text-align: left; font-size: .85rem; color: var(--muted); margin: 12px 0 4px; }
.field input, .req input { display: block; width: 100%; margin-top: 4px; padding: 11px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--bg); color: var(--text); font: inherit; font-size: 1rem; }
.code { font: 700 2.2rem/1 var(--mono); letter-spacing: .12em; margin: 18px 0 8px; padding: 18px 10px; background: var(--accent-soft); border-radius: 14px; color: var(--text); }

/* ---------- app layout ---------- */
.app { display: flex; height: 100%; height: 100dvh; }
.sidebar { width: 270px; flex: none; background: var(--sidebar); border-right: 1px solid var(--border); display: flex; flex-direction: column; }
.sidebar-head { padding: 12px; }
.chat-list { flex: 1; overflow-y: auto; padding: 0 8px 8px; }
.chat-item { display: flex; align-items: center; gap: 6px; width: 100%; text-align: left; padding: 9px 10px; border-radius: 9px; border: 0; background: none; color: var(--text); font: inherit; cursor: pointer; }
.chat-item:hover { background: var(--border); }
.chat-item.active { background: var(--accent-soft); }
.chat-item .t { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-item .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); flex: none; animation: pulse 1.2s infinite; }
.chat-item .del { opacity: 0; font-size: .85rem; color: var(--muted); padding: 0 4px; }
.chat-item:hover .del { opacity: 1; }
.sidebar-foot { border-top: 1px solid var(--border); padding: 10px 14px; font-size: .8rem; color: var(--muted); }
.scrim { display: none; }

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar { display: flex; align-items: center; gap: 8px; padding: 8px 12px; border-bottom: 1px solid var(--border); background: var(--bg); padding-top: max(8px, env(safe-area-inset-top)); }
.tabs { display: flex; background: var(--sidebar); border-radius: 10px; padding: 3px; flex: none; }
.tab { appearance: none; border: 0; background: none; color: var(--muted); font: inherit; font-weight: 550; padding: 5px 12px; border-radius: 8px; cursor: pointer; }
.tab.active { background: var(--panel); color: var(--text); box-shadow: 0 1px 3px rgba(0, 0, 0, .1); }
.title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; padding-left: 6px; }
.badge-host { position: relative; }
.badge { position: absolute; top: 3px; right: 2px; background: var(--danger); color: #fff; font-size: .68rem; font-weight: 700; min-width: 17px; height: 17px; border-radius: 9px; display: grid; place-items: center; padding: 0 4px; }
.menu-host { position: relative; }
.menu { position: absolute; right: 0; top: 42px; background: var(--panel); border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow); padding: 6px; min-width: 190px; z-index: 30; }
.menu button { display: block; width: 100%; text-align: left; padding: 9px 12px; border: 0; background: none; color: var(--text); font: inherit; border-radius: 8px; cursor: pointer; }
.menu button:hover { background: var(--sidebar); }
.menu .danger { color: var(--danger); font-weight: 600; }
.menu hr { border: 0; border-top: 1px solid var(--border); margin: 4px 0; }
.pane { flex: 1; min-height: 0; display: flex; flex-direction: column; }

/* ---------- messages ---------- */
.messages { flex: 1; overflow-y: auto; padding: 20px 16px 8px; scroll-behavior: auto; }
.messages > * { max-width: 820px; margin-left: auto; margin-right: auto; }
.empty { text-align: center; margin-top: 12vh; }
.empty img { border-radius: 10px; margin-bottom: 8px; }
.msg { margin-bottom: 14px; overflow-wrap: anywhere; }
.msg.user { display: flex; justify-content: flex-end; }
.msg.user .bubble { background: var(--user-bubble); padding: 9px 14px; border-radius: 16px 16px 4px 16px; max-width: 85%; white-space: pre-wrap; }
.msg.assistant .md > :first-child { margin-top: 0; }
.msg.assistant .md > :last-child { margin-bottom: 0; }
.md pre { background: var(--code-bg); padding: 12px; border-radius: 10px; overflow-x: auto; border: 1px solid var(--border); }
.md code { background: var(--code-bg); padding: 1px 5px; border-radius: 5px; }
.md pre code { background: none; padding: 0; }
.md table { border-collapse: collapse; display: block; overflow-x: auto; max-width: 100%; }
.md table code { white-space: nowrap; overflow-wrap: normal; }
.md th, .md td { border: 1px solid var(--border); padding: 5px 10px; text-align: left; }
.md a { color: var(--accent); }
.md img { max-width: 100%; }
.md blockquote { margin: 0; padding-left: 12px; border-left: 3px solid var(--border); color: var(--muted); }
.live .md { white-space: pre-wrap; }
.tool { margin: 0 auto 6px; font-size: .85rem; }
.tool details { background: var(--tool-bg); border: 1px solid var(--border); border-radius: 9px; }
.tool summary { cursor: pointer; padding: 6px 10px; color: var(--muted); list-style: none; display: flex; gap: 8px; align-items: baseline; overflow: hidden; }
.tool summary::-webkit-details-marker { display: none; }
.tool summary .n { color: var(--text); font-weight: 600; flex: none; }
.tool summary .s { font-family: var(--mono); font-size: .82rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tool summary .st { margin-left: auto; flex: none; }
.tool.sub summary { padding-left: 24px; }
.tool pre { margin: 0; padding: 8px 10px; border-top: 1px solid var(--border); white-space: pre-wrap; word-break: break-word; max-height: 360px; overflow: auto; font-size: .8rem; }
.tool .err { color: var(--danger); }
.note { text-align: center; font-size: .85rem; color: var(--muted); margin: 10px auto; }
.note.error { color: var(--danger); white-space: pre-wrap; text-align: left; background: var(--danger-soft); padding: 8px 12px; border-radius: 9px; }
.typing { display: flex; gap: 4px; padding: 6px 2px; }
.typing span { width: 7px; height: 7px; background: var(--muted); border-radius: 50%; animation: pulse 1.2s infinite; }
.typing span:nth-child(2) { animation-delay: .2s; } .typing span:nth-child(3) { animation-delay: .4s; }
@keyframes pulse { 0%, 100% { opacity: .3; } 50% { opacity: 1; } }

.guard-banner { display: flex; gap: 10px; align-items: center; justify-content: space-between; flex-wrap: wrap; max-width: 820px; margin: 0 auto 6px; width: calc(100% - 32px); background: var(--accent-soft); border-radius: 10px; padding: 8px 12px; font-size: .9rem; }

/* ---------- composer ---------- */
.composer { padding: 8px 16px max(12px, env(safe-area-inset-bottom)); }
.composer-row, .attachments, #grant-line { color: var(--ok); }
.composer-meta { max-width: 820px; margin: 0 auto; }
.composer-row { display: flex; align-items: flex-end; gap: 8px; background: var(--panel); border: 1px solid var(--border); border-radius: 16px; padding: 6px 6px 6px 4px; box-shadow: 0 2px 8px rgba(0, 0, 0, .04); }
.composer textarea { flex: 1; border: 0; outline: 0; resize: none; background: none; color: var(--text); font: inherit; font-size: 16px; padding: 8px 4px; max-height: 40vh; min-height: 24px; }
.composer-meta { display: flex; justify-content: space-between; gap: 8px; font-size: .78rem; color: var(--muted); padding: 4px 6px 0; min-height: 1.4em; }
.attachments { display: flex; flex-wrap: wrap; gap: 6px; }
.attachments:not(:empty) { margin-bottom: 6px; }
.chip { background: var(--sidebar); border: 1px solid var(--border); border-radius: 8px; padding: 3px 8px; font-size: .8rem; display: flex; gap: 6px; align-items: center; }
.chip button { border: 0; background: none; color: var(--muted); cursor: pointer; padding: 0; }

/* ---------- terminal ---------- */
.term-gate { max-width: 520px; margin: 12vh auto 0; text-align: center; padding: 0 16px; }
.term { flex: 1; min-height: 0; background: #1a1918; padding: 6px; }

/* ---------- dialogs ---------- */
.dialog { border: 1px solid var(--border); border-radius: 16px; background: var(--panel); color: var(--text); padding: 18px 20px; width: min(480px, calc(100vw - 32px)); max-height: 85vh; box-shadow: var(--shadow); }
.dialog.wide { width: min(860px, calc(100vw - 32px)); }
.dialog::backdrop { background: rgba(0, 0, 0, .4); }
.dialog header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.dialog header h2 { margin: 0; }
.req, .dev { border: 1px solid var(--border); border-radius: 12px; padding: 12px; margin-top: 10px; }
.req .meta, .dev .meta { font-size: .8rem; color: var(--muted); word-break: break-word; }
.req .actions, .dev .actions { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }
.req input::placeholder { text-transform: none; letter-spacing: normal; font-family: var(--font); }
.req input { font-family: var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.dev .name { font-weight: 600; }
.dev .cur { font-size: .75rem; background: var(--accent-soft); border-radius: 6px; padding: 1px 6px; margin-left: 6px; font-weight: 500; }
.act-list { font-size: .82rem; overflow-x: auto; }
.act-list table { border-collapse: collapse; width: 100%; }
.act-list td, .act-list th { text-align: left; padding: 5px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
.act-list td.d { color: var(--muted); max-width: 320px; overflow-wrap: anywhere; }
.toast { position: fixed; left: 50%; bottom: 90px; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 9px 16px; border-radius: 10px; font-size: .9rem; z-index: 100; max-width: calc(100vw - 32px); box-shadow: var(--shadow); }

/* ---------- mobile ---------- */
.only-mobile { display: none; }
@media (max-width: 760px) {
  .only-mobile { display: inline-grid; }
  .sidebar { position: fixed; inset: 0 auto 0 0; z-index: 40; transform: translateX(-100%); transition: transform .2s; width: 82vw; max-width: 300px; padding-top: env(safe-area-inset-top); }
  .app.nav-open .sidebar { transform: none; }
  .app.nav-open .scrim { display: block; position: fixed; inset: 0; background: rgba(0, 0, 0, .35); z-index: 35; }
  .title { display: none; }
  .topbar { gap: 4px; padding-left: 8px; padding-right: 8px; }
  .tabs { margin-right: auto; }
  .messages { padding: 14px 12px 6px; }
  .composer { padding-left: 10px; padding-right: 10px; }
  .msg.user .bubble { max-width: 92%; }
}